pls all of one and #2 pls pls

Mark Make-a-Buck sells jars of beach sand in Florida. His price per jar is $2.50. His historical costs have been: JarCapLabelSalescommissiontoretailersExcavatingmachinedepreciationMarkssalary(President)$.40peritem$.10peritem$.30peritem$.20peritem$500permonth$1,000permonth 1. a. What is Mark's breakeven point for the year, in terms of both quantity and sales dollars on a pretax basis? b. Mark wants to make a target profit of $20,000 after tax for the year. How many jars of beach sand would he need to sell? Mark's tax rate is 20%. c. Mark generated revenues of $50,000 in 2021 . What was his margin of safety in both dollars and sales quantity? d. What was Mark's operating leverage in 2021? 2. Use the Excel Goal seek function to prove that you calculated the correct numbers in 1a. and 1b. above